"Walk mode" missing

Walk key (“alt” by default) doesn’t have any effect for me.
And this console commands neither:
hl2_walkspeed
hl2_normspeed
Hl2_sprintspeed

Walk mode seems to me important for immersion.

Do you have ‘Always Run’ turned on in the Black Mesa tab of the options ?

No, “Always run” it’s unchecked in my options tab.

Maybe I must emphasize I’m talking about walk slow mode (“Alt” key)

I’d like to use “walk slow” mode too ;o) Hopefully it will be implemented later.

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.